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Siemens SCALANCE FragAttacks (CVE-2020-24588)

low Tenable OT Security Plugin ID 501043

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://www.fragattacks.com

https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md

http://www.openwall.com/lists/oss-security/2021/05/11/12

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf

http://www.nessus.org/u?1eb2468b

http://www.nessus.org/u?be0512b5

http://www.nessus.org/u?839210e5

https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html

Plugin Details

Severity: Low

ID: 501043

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 4/11/2023

Updated: 10/19/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Low

Base Score: 2.9

Temporal Score: 2.4

Vector: CVSS2#AV:A/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2020-24588

CVSS v3

Risk Factor: Low

Base Score: 3.5

Temporal Score: 3.3

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:scalance_wam766-1_firmware:-::~~~~eec~, cpe:/o:siemens:scalance_w734-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w722-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w721-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w738-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1788-2_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w786-2_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w1750d_firmware:-, cpe:/o:siemens:scalance_w774-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_wum766-1_firmware:-, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1748-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1788-2ia_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_wum763-1_firmware:-, cpe:/o:siemens:scalance_w778-1_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w786-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w748-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w748-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_wam766-1_6ghz_firmware:-, cpe:/o:siemens:scalance_w788-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_wam766-1_6ghz_firmware:-::~~~~eec~, cpe:/o:siemens:scalance_w1788-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1788-2_firmware:-::~~~~eec_m12~, cpe:/o:siemens:scalance_wam766-1_firmware:-, cpe:/o:siemens:scalance_w774-1_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w761-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w786-2ia_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w788-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w778-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_wam763-1_firmware:-, cpe:/o:siemens:scalance_w786-2_firmware:-::~~~~sfp~, cpe:/o:siemens:scalance_wum766-1_6ghz_firmware:-

Required KB Items: Tenable.ot/Siemens

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Reference Information

CVE: CVE-2020-24588

CWE: 327